Halvoe halvorson



H, HALVORSON.

Lamp. No. 25,506. Patented Sept. 20, 1859.`v

UNITED STATES PATENT OFFICE.

HALVOR I-IALVORSON, OF CAMBRIDGE, MASSACHUSETTS.

LAMP.

Specification forming part of Letters Patent No. 25,506, dated September 20, 1859*; Ressued June 6, 1871, No. 4,413.

To all whom it may concern:

Be it known that I, HALvoR HALvoRsoN, of Cambridge, in the county of Middlesex and State of Massachusetts, have invented a new and Improved Lamp; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figures 1 and 2, are vertical central sections of my invention, the two planes of section crossing each other at right angles.

Similar letters of reference indicate corresponding parts in the two figures.

The object of this invention is to obtain a lamp that will burn, for illuminating` purposes, hydrocarbon fluids varying in density and which require different supplies of oxygen to support proper combustion. The invention although it may be used for burning all hydrocarbon fluids is more especially de; signed for burning coal oils and by a certain mechanism hereinafter fully described, intended to be rendered capable of such adjustment as to burn both the light and heavy oils with a white or brilliant flame.

The invention consists in the employment or use of two wick tubes connected at their ends or inclosed so as to form a chamber between, the chamber being provided with a valve and with a wick-elevating device, the parts being so arranged that both wicks may be elevated and depressed by the turning of a single rod, and the volume of air that feeds the interior of the flame regulated as may be required.

To enable those skilled in the art to fully understand and construct my invention I will proceed to describe it.

A, represents a circular plate or dish shaped top which is screwed into the top of the lamp as usual and B, B, are two flat wick tubes the lower ends of which pass through the plate A, the space between them being open, and the upper parts of the tubes connected by plates a, a, which form a chamber b, as shown clearly in Fig. 1. The wick tubes B, B, are inclined, their upper parts being nearer together than their lower parts, and between the wick tubes a valve C, is

placed. This valve may be formed of a rec tangular plate having its journals or pivots o, at the center of each end, as shown clearly in Fig. 2.

At the inner side of each wick tube B, B, the bearings d, of shafts c, f, are attached. These shafts are allowed to turn freely in their bearings and there is one shaft attached to each wick tube. Cn each wick tube there are three toothed or spurred wheels e, which work through slots f, in the inner sides of the wick tubes and bear against the wick tubes for the purpose of raising them. The wheels o', of one shaft gear into those of the other and consequently by turning one shaft, motion will be communicated to the other, and both wicks g, raised and lowered simultaneously. One shaft f, is made considerably longer than the other e, and extends through the side of a perforated cylinder D, so that the wicks can be adjusted with the greatest facility, see Fig. 2. The perforated cylinder D, encompasses the upper part of the top A, and is secured to it by screws L, h, and forms a chamber around the wick tubes B, B.

In the upper part of the cylinder D, a cap E, is fitted. This cap is of the usual form and encompasses the upper parts of the tubes B, B, and is allowed to slide freely up and down in the cylinder D, the cap` having a pendent rack z', attached which gears into a pinion j, on a shaft lo, that passes through the cylinder D. The cap E, has a slot Z, made in its upper end as usual to allow the flame m, to pass through, and an annular chamber or recess a, is secured to the upper part of the cylinder D, to receive and secure the chimney to the lamp, see dotted lines Fig. 1.

The operation is as follows: The flame m, is supplied with oxygen through the perforated cylinder D, which serves to render the supply uniform and prevent a flickering of the flame, the air passing upward between the wick tubes and cap and deflected and made to impinge against the flame by the cap. The air also passes between the wick tubes B, B, and upward into the center of the flame. The red arrows indicate the direction of the air. Then light oils are being burned considerable oxygen is required t0 supply the flame in order to insure perfeet combustion, and the cap E, is then elevated in order to form a draft chamber of suiiicient capacity to effect the desired result. The valve C', is also opened to admit the air freely through the chamber b, and into the center of the flame m. When heavy oils are burned the cap E, is lowered and the valve C, partially closed in order to diminish the supply of oxygen to the Hame. This raising and lowering of the cap is an important feature of the invention for it is the principal means for regulating the supply of air.

I am aware that two wick tubes have been previously used and both in an inclined and vertical position. I therefore do not claim said tubes when separately considered, nor do I claim encompassing or surrounding the wick tubes with a perforated cylinder D, for 20 such device has also been used; but,

I do claim as new and desire to secure by Letters Patent:

l. The employment or use of the valve C,

in connection with the wick tubes B, B, for 25 the purpose of regulating the supply of air to the interior of or between the two iames of the wicks g, g.

2. The arrangement of the shafts e, f,

and their wheels e, so that the wheels e on 30 one shaft may gear into those on the other for the purpose of raising and lowering the wicks simultaneously by the turning of one 

